Packing for reciprocating rods.



I. J. BENT. PACKING FOR REGIPROGATING RODS. APPLICATION FILED JUNE 23,1010.

1,040,494. Patented Oct. 8, 1912.

W|TNEEEEE %MINVENTEJR aka/Mag I 'AT'T'EJFQNEY COLUMBIA PLANOCIRAPH coWASHINGTON D- c.

IRVING J. BENT, OF CHICAGO, ILLINOIS,

MILWAUKEE, WISCONSIN,

ASSIGNOR TO ALLIS-CHALMERS COMPANY, OF A CORPORATION OF NEW JERSEY.

PACKING FOR REGIPROCATING RODS.

Specification of Letters Patent.

Patented Oct. 8, 1912.

Application filed June 23, 1910. Serial No. 568,424.

To all whom it may concern:

Beit known that I, IRVING J. BENT, a citizen of the United States,residing at Uhicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Packing forReciprocat-ing Rods, of which the following is a specification.

This invention relates to improvements in the construction of packing,and. in par-- ticular to improvements in the construction of metallicpacking used for packing reciprocating rods.

The objectof the invention is to provide a metallic packing forreciprocating rods which is simple in its construction and ethcient inoperation.

A clear conception of one embodiment of the invention can be obtained byreferring to the accompanying drawing in which like reference charactersdesignate the same or similar parts.

The drawing shows a plan view of a metallic three-section packing ringconstructed in accordance with the invention, a portion of one of thesegments of the ring hcing shown in section.

The metallic packing ring consists essentially of three equal segmentsor sections 1, which sections 1 are separated by small air gaps orspaces 4 intermediate their adjacent ends. The sections 1 have lugs orprojections 6 at their ends, which projections extend outwardly beyondthe normal external diameter of the major portion of the ring formed bythe three sections 1. The spring ring 3 coacts against the outer ends ofthe projections 6 only, being free from coaction with the remainingouter surfaces of the sections, and is constructed with its mid portionof slightly greater thickness than its end portions so as to produceequal inward pressure at all points of its length. One of the sections 1is provided with dowels 2, or similar outwardly projecting means, nearits ends but intermediate the projections 6 formed thereon. The dowels 2project somewhat beyond the ends of the projections 6. The spring ring 3is of such length that it embraces two of the sections 1 and theprojections 6 of the third section 1, thus eX- tending from dowel todowel around the major portion of the packing.

In the construction of the packing the sections 1 are preferablyconstructed of a cast material, such as iron, brass, or other metal. Themutilated spring ring 8 which coacts with the projections 6 on thesections 1 is made of steel and has an internal diameter, before beingplaced in normal coaction with the lug 6, which is somewhat less thanthat to which it is spread during its positioning around the sections 1.In casting the sections 1, a single mold suflices for easting all of thesections of a ring, since these sections 1 are all alike. It will alsobe noted that it is ,not intended to limit this invention to athree-section ring, as any desired number of sections could be used.

In machining the sections 1 forming the ring, the three sections 1 areplaced into a chuck and the outer ends of their projections 6 are turnedto the proper diameter. The sections 1 forming the ring are then placedinto an external chuck which coacts against the machined periphery ofthe projections 6, and the internal surface is turned to its properdiameter. The side surfaces of the ring are then machined to make thesections 1. of a desired width. Holes are then drilled into one of thesections 1 and the dowels 2 inserted therein, these dowels 2 beingpressed or brazed into place.

In placing the packing ring onto a reciprocating shaft, therebyutilizing same as a packing ring, the three sections 1 forming the ringare first placed in coaction with and sin-rounding the shaft, theinternal surfaces of the sections 1 coacting with the outer surface ofthe shaft. The spring ring 3 is then snapped into place and holds thesections firmly in position. The dowels 2 prevent the spring ring 3 fromshifting circumferent-ially around the sections 1 and thus preventpossibility of any of the sections becoming loose.

It will be noted that with the construction shown an annular space 5 isformed between the sections 1 and the spring ring 3, due to the coactionof the ring 3 with the sections 1 at the ends of the projections 6 only.This feature prevents the spring ring from sticking in any set positionon the sections 1 which it embraces, thus producing a more effectivepacking due to the flexibility thereof, than would be obtained by havingthe spring ring 3 coact with the entire outer surfaces of the sections1.

The sections 1 could just as easily be formed with a continuous outersurface or periphery having a diameter equal to that of the peripheriesof the projections 6. With such a construction the spring ring 3 would.be formed with inwardly projecting lugs at its end and central portion.Such construct-ion would be an inversion of the construction shown,since the lugs or projections 6 would in this event be formed on theinterior of the ring 8 instead of on the exterior of the sections 1. Theeffect produced by such a construction would be exactly analogous tothat produced by the construction shown.

If the ring were formed of more than three sections 1, the springring 3would be of greater length, in every case embracing all but one of thesections. The ring 3 need not be mutilated as shown, and may extendaround the entire packing ring, but such construction would only bedesirable if the projection 6 were formed at the mid instead of the endport-ions of the sections 1. Such construction would avoid the use ofdowels 2, since the sections 1 would find no multilation in the ring 3at which they could become loosened.

It should be understood that it is not desired to be limited to theexact details of construction shown and described, for obviousmodifications will occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent:

1. In a metallic packing, a rod, a plurality of end to end sectionscoacting about said rod, single spring ring coacting about said sectionsand in contact therewith at points near the adjacent ends of saidsection only, and means for preventing circumferential shifting of saidring.

2. In a metallic packing, a rod, a plurality of metallic sectionscoacting with said rod, a ring directly coacting with the sections onlyat points adjacent the ends of said sections, and means for preventingcircumferential shifting of said ring.

8. In a metallic packing, a rod, a plurality of metallic sectionscoacting with said rod and having adjacent ends, an outwardly projectingportion on each of said sections, a ring directly coacting with saidoutwardly projecting portions only, said ring tending to retain saidportions in coaction with said rod, and means for preventingcircumferential shifting of said ring.

at. In a metallic packing, a rod, a plurality of end to end sect-ionscoacting with said rod, a ring surrounding said sections and spacedtherefrom except at points adjacent the ends of said sections, said ringdirectly coacting with said sections at said points, and means forpreventing circumferential shifting of said ring.

In testimony whereof, I affiX my signature in the presence of twowitnesses.

IRVING J. BENT.

Witnesses J ACOB M. DAMPTZ, BENJAMIN B. WOOLEY.

Copies of this patent may be obtained for five cents each, by addressingthe Gommissioner of Patents.

Washington, D. G.

It is hereby certified that in Letters Patent No. 1,040,494, grantedOctober 8, 1912, upon the application of Irving J. Bent, of Chicago,Illinois, for an improvement in acking for Reciprocating Rods errorsappear in the printed specification requiring correction as follows:Page 2, line 36, before the Word single insert the article a; same page,line 38, for the word section read sections; and that the said LettersPatent should be read with these corrections therein that the same mayconform to the record of the case in the Patent Oflice.

Signed and sealed this 29th day of October, A. D., 1912.

[SEAL] o. o. BILLINGS,

Acting Commissioner of Patents.

